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| PartNumber | BD439S | BD439 | BD439-PHI |
| Description | Bipolar Transistors - BJT NPN TRANS TO-126 | TRANS NPN 60V 4A TO-225AA | |
| Manufacturer | ON Semiconductor | CJ | - |
| Product Category | Bipolar Transistors - BJT | Transistors (BJT) - Single | - |
| RoHS | Y | - | - |
| Mounting Style | Through Hole | - | - |
| Package / Case | TO-126-3 | - | - |
| Transistor Polarity | NPN | - | - |
| Configuration | Single | - | - |
| Collector Emitter Voltage VCEO Max | 60 V | - | - |
| Collector Base Voltage VCBO | 60 V | - | - |
| Emitter Base Voltage VEBO | 5 V | - | - |
| Collector Emitter Saturation Voltage | 0.8 V | - | - |
| Maximum DC Collector Current | 4 A | - | - |
| Gain Bandwidth Product fT | 3 MHz | - | - |
| Minimum Operating Temperature | - 65 C | - | - |
| Maximum Operating Temperature | + 150 C | - | - |
| Series | BD439 | - | - |
| Height | 11 mm | - | - |
| Length | 8 mm | - | - |
| Packaging | Bulk | - | - |
| Width | 3.25 mm | - | - |
| Brand | ON Semiconductor / Fairchild | - | - |
| Continuous Collector Current | 4 A | - | - |
| DC Collector/Base Gain hfe Min | 20 | - | - |
| Pd Power Dissipation | 36 W | - | - |
| Product Type | BJTs - Bipolar Transistors | - | - |
| Factory Pack Quantity | 2000 | - | - |
| Subcategory | Transistors | - | - |
| Part # Aliases | BD439S_NL | - | - |
| Unit Weight | 0.026843 oz | - | - |